Add support for linear-referenced tags. (#900)

planetiler-benchmarks/src/main/java/com/onthegomap/planetiler/benchmarks/BenchmarkLineSplitter.java

@@ -0,0 +1,74 @@
+package com.onthegomap.planetiler.benchmarks;
+
+import com.onthegomap.planetiler.geo.LineSplitter;
+import java.util.concurrent.ThreadLocalRandom;
+import org.locationtech.jts.util.GeometricShapeFactory;
+
+public class BenchmarkLineSplitter {
+
+  public static void main(String[] args) {
+    for (int i = 0; i < 10; i++) {
+      System.err.println(
+        "reused:\t" +
+          timeReused(10, 1_000_000) + "\t" +
+          timeReused(100, 100_000) + "\t" +
+          timeReused(1_000, 10_000) +
+          "\t!reused\t" +
+          timeNotReused(10, 1_000_000) + "\t" +
+          timeNotReused(100, 100_000) + "\t" +
+          timeNotReused(1_000, 10_000) +
+          "\tcacheable\t" +
+          timeCacheable(10, 1_000_000) + "\t" +
+          timeCacheable(100, 100_000) + "\t" +
+          timeCacheable(1_000, 10_000));
+    }
+  }
+
+  private static long timeCacheable(int points, int iters) {
+    var fact = new GeometricShapeFactory();
+    fact.setNumPoints(points);
+    fact.setWidth(10);
+    var shape = fact.createArc(0, Math.PI);
+    long start = System.currentTimeMillis();
+    LineSplitter splitter = new LineSplitter(shape);
+    var random = ThreadLocalRandom.current();
+    for (int i = 0; i < iters; i++) {
+      int a = random.nextInt(0, 90);
+      int b = random.nextInt(a + 2, 100);
+      splitter.get(a / 100d, b / 100d);
+    }
+    return System.currentTimeMillis() - start;
+  }
+
+  private static long timeReused(int points, int iters) {
+    var fact = new GeometricShapeFactory();
+    fact.setNumPoints(points);
+    fact.setWidth(10);
+    var shape = fact.createArc(0, Math.PI);
+    long start = System.currentTimeMillis();
+    LineSplitter splitter = new LineSplitter(shape);
+    var random = ThreadLocalRandom.current();
+    for (int i = 0; i < iters; i++) {
+      var a = random.nextDouble(0, 1);
+      var b = random.nextDouble(a, 1);
+      splitter.get(a, b);
+    }
+    return System.currentTimeMillis() - start;
+  }
+
+  private static long timeNotReused(int points, int iters) {
+    var fact = new GeometricShapeFactory();
+    fact.setNumPoints(points);
+    fact.setWidth(10);
+    var shape = fact.createArc(0, Math.PI);
+    long start = System.currentTimeMillis();
+    var random = ThreadLocalRandom.current();
+    for (int i = 0; i < iters; i++) {
+      LineSplitter splitter = new LineSplitter(shape);
+      var a = random.nextDouble(0, 1);
+      var b = random.nextDouble(a, 1);
+      splitter.get(a, b);
+    }
+    return System.currentTimeMillis() - start;
+  }
+}